The Sacramento-San Joaquin Delta provides much of California's drinking water. It's also home to hundreds of wildlife species. Yet, climate change and sea-level rise threaten to shift this delicate balance, possibly for good.

The world's climate is changing and California is now being affected in both dramatic and subtle ways. Get an in-depth look at the science behind climate change as we explore the environmental changes taking place throughout the state.

In the war against global warming, regulators have a new worry: methane. It's been getting more attention of late, because scientists say as a greenhouse gas, it's many times more potent than carbon dioxide.